Composite material containing fluorine-containing titanium phosphate compound as well as preparation method and application of composite material

A composite material and compound technology, which is applied to the composite material containing fluorine-containing titanium phosphate compound and the fields of its preparation and use, can solve the problems of slow sodium ion migration kinetics and the like, and achieve the effect of improving the charging and discharging performance of high current.

Active Publication Date: 2015-04-29
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although a large number of transition metal oxides [9,10], phosphates [11,12], fluorophosphates [13], hexacyanoides [14] and polymers [15] have shown Considerable capacity and cycle ability, but its energy density and rate capability are still far from the requirements of battery applications, because the radius of the sodium ion ( ) than lithium-ion ( ) is much larger, leading to slow sodium ion migration kinetics

Method used

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  • Composite material containing fluorine-containing titanium phosphate compound as well as preparation method and application of composite material
  • Composite material containing fluorine-containing titanium phosphate compound as well as preparation method and application of composite material
  • Composite material containing fluorine-containing titanium phosphate compound as well as preparation method and application of composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0083] This example is used to illustrate the fluorine-containing titanium phosphate compound (Na 3 [Ti 2 P 2 o 10 F]) and methods for their preparation.

[0084] Specifically, a hydrothermal method was used to prepare Na 3 [Ti 2 P 2 o 10 F]·xH 2 O, the specific steps include:

[0085] (1) 6g of analytically pure titanium sulfate (Ti(SO 4 ) 2 ), 36g sodium borate (NaBO 3 4H 2 O), 19g ammonium dihydrogen phosphate and 3g sodium fluoroborate (NaBF 4 ) was mixed with 20mL of deionized water and stirred evenly to prepare a mixture solution;

[0086] (2) Put the mixture solution prepared in step (1) into a 50mL stainless steel autoclave lined with polytetrafluoroethylene, seal it, heat it at 200°C for 2 days, and then cool it to room temperature to obtain a white product;

[0087] (3) Wash the white product obtained in step (2) with water and ethanol, and dry it at room temperature to obtain Na 3 [Ti 2 P 2 o 10 F]·xH 2 O sample;

[0088] (4) Na obtained in step ...

Embodiment 2

[0092] This example is used to illustrate the fluorine-containing titanium phosphate compound (Na 3 [Ti 2 P 2 o 10 F]) and methods for their preparation.

[0093] Specifically, a hydrothermal method was used to prepare Na3 [Ti 2 P 2 o 10 F]·xH 2 O, the specific steps include:

[0094] (1) Add 6g of titanium sulfate (Ti(SO 4 ) 2 ), 36g sodium borate (NaBO 3 4H 2 O), 12 mL of 85% H 3 PO 4 and 3 g sodium fluoroborate (NaBF 4 ) mixed with 10mL of ammonia water with a concentration of 25-28%, and stirred evenly to prepare a mixture solution;

[0095] (2) Put the mixture solution prepared in step (1) into a 50mL stainless steel autoclave lined with polytetrafluoroethylene, seal it, heat it at 200°C for 7 days, and then cool it to room temperature to obtain a white product;

[0096] (3) Wash the white product obtained in step (2) with water and ethanol, and dry it at room temperature to obtain Na 3 [Ti 2 P 2 o 10 F]·xH 2 O sample;

[0097] (4) Na obtained in step...

Embodiment 3

[0100] This example is used to illustrate the fluorine-containing titanium phosphate compound (Na 3 [Ti 2 P 2 o 10 F]) and carbon black composite Na 3 [Ti 2 P 2 o 10 F]-30wt% carbon black and its preparation method.

[0101] The fluorine-containing titanium phosphate compound (Na 3 [Ti 2 P 2 o 10 F]) powder and 30 parts by weight of commercial carbon black (model KS-6, particle size 200nm ~ 50μm, purchased from Dongguan New Energy Technology Co., Ltd.) were mixed, put into a ball mill jar, and absolute ethanol was added as a ball mill medium. Mixed by ball milling for 10 hours and then dried at room temperature to obtain the composite Na 3 [Ti 2 P 2 o 10 F]-30wt% carbon black, the number is No.1.

[0102] Adopt scanning electron microscope to observe the composite material Na that embodiment 3 makes 3 [Ti 2 P 2 o 10 F]-30wt% carbon black size and morphology, the results are as image 3 shown.

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Abstract

The invention provides a composite material containing a fluorine-containing titanium phosphate compound as well as a preparation method for the composite material. The composite material comprises the following raw materials in percentage by weight: 60-99 percent of the fluorine-containing titanium phosphate compound and 1-40 percent of an electronic conductive material, wherein the chemical formula of the fluorine-containing titanium phosphate compound is Na3[Ti2P2O10F]. The invention further provides a lithium ion battery anode material containing the composite material, a sodium-ion battery anode material containing the composite material and corresponding batteries. Furthermore, the invention further relates to application of the composite material containing the fluorine-containing titanium phosphate compound in a lithium ion battery and a sodium-ion battery, and particularly application in a room-temperature lithium ion battery and a room-temperature sodium-ion battery. The composite material disclosed by the invention has the advantages of low cost, low voltage, high capacity, environment friendliness and the like.

Description

technical field [0001] The invention relates to a composite material containing fluorine-containing titanium phosphate compound and its preparation method and application, in particular to the application of the composite material in lithium ion batteries and sodium ion batteries. Background technique [0002] Currently, the increasing demand for energy stimulates the research and development of alternative energy conversion and storage systems that are efficient, low-cost, and environmentally friendly. Compared with other energy storage devices, lithium-ion batteries have high energy density, which can store electrical energy converted from nuclear energy, solar energy, wind energy, and tidal energy, and release the electrical energy when the power supply is insufficient to meet people's demand for electrical energy. demand. [0003] So far, graphite is still the main anode material for rechargeable lithium-ion batteries. Its working principle is that lithium ions are inte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M4/36
CPCH01M4/136H01M4/1397H01M4/362H01M4/5825H01M4/62H01M10/0525H01M10/054H01M2004/027Y02E60/10
Inventor 孙春文马朝晖杨伟陈立泉
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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